Help me with modifications
 

With these engine modifications What do I need to increase my performance?

GT 40 Upper and lower intake manifolds
GT 40 heads.
I only have 19# injectors

Would a bigger throttle body be worth the money?

Would a bigger throttle body be worth the money?

Yes. A 65mm TB is a good choice for your combo. the 19# injectors are O.K. for now, but after 300 HP, you'll want the 24# squirters and I suggest a 190 lph FP ASAP.
Consider headers and exhaust, to better get all that air out and of course, rear gears.

I have a nice exhaust system. I think my headers are stock. I also have a 110 lpg fuel pump. Will this pump be ok for a while?

What should I hope to get out of a bigger trottle body?

your pump will be fine for now. a bigger throttle body will be a benefit to your current setup, as you are movin more air. if you do that and headers/h-pipe, the azz-dyno will easily feel it.

65mm TB/egr spacer and C&L 76mm MAF will compliment your induction nicely. Also, as mentioned, headers, and a h or x pipe will go well with your combo. From there, it's all a matter of fine tuning (timing and fuel pressure).

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TM88GT